Database Develop

power from the micro usb connector?

I'm in the process of developing a small device to work with the HD2 (like gps, but indoors).
This is a small chip that I will communicate with trough the micro usb port.
Now my question: can I somehow power the device (very low power) with power from the hd2 (ideally trough the existing micro usb connector).
Does anyone know this? I can't seem to find the answer to this.
Any help is appreciated

Have you measured if there is an output?
The 3 gold contacts near the batt pack have 0V and the batt supply on them. Maybe you could get the extended battery cover without batt and use the extra space to house your gadget. That way no protrouding objects.
Wayne

I havent been able to measure yet, I'll try that ofcourse, but I thought someone here might have the answer already.
The power really has to come from the micro-usb slot. Think of the device as a small usb-stick.

Hello
And if you Buy a µUSB to USB cable (cheap on Ebay), cut the cable and with tester you have your + and - power ????
After you take it for power of your small device...
Not to difficult
And the micro USB for the Léo is a micro usb standard look here : http://en.wikipedia.org/wiki/Universal_Serial_Bus
@+

The HD2 doesn't supply any power from the connector. As it wasn't meant to have USB host functionality that's not implemented.

Sorry
I thought there was still an "output power"!!!
Effectively It's just "Input power"
@+

[Q] Simultaneous OTG host mode and charging?

I know a few other phones have managed to enable OTG host mode and charging simultaneously via a resistor on pin 4 (ID/sense) of the usb port. This apparently enables dock mode. I know the SIII does it as well as some xperias. Anyone know if the note has a mode like this, and what the resistor value is? Galaxy nexus its possible to patch the kernal to disable the boost mode from internal battery on OTG host mode. Anyone done anything for the note?

Geekybiker said:
I know a few other phones have managed to enable OTG host mode and charging simultaneously via a resistor on pin 4 (ID/sense) of the usb port. This apparently enables dock mode. I know the SIII does it as well as some xperias. Anyone know if the note has a mode like this, and what the resistor value is? Galaxy nexus its possible to patch the kernal to disable the boost mode from internal battery on OTG host mode. Anyone done anything for the note?
Click to expand...
Click to collapse
In my limited knowledge, I have just tried one of these with no success. No mods to the cable or the kernel or anything. Just wishfully hoping it might work. It does not. I am not even sure it is getting power to the USB device properly. I am trying to run a small Seagate FreeAgent disk drive. As expected, it runs fine when plugged into a USB port on my desktop or laptop. Plugged into the OTG using the standard OTG-type cable or this Y cable - without additional power - yields nothing as I would expect. Applying supplemental power to the Y cable from either a PC USB port or from the phone's charger gets the drive making a little noise and lighting up. But the phone still does not recognize the device. And I hear this slight pulsing noise from the disk itself that is not heard when plugged into the PC. Alas! Perhaps it needs yet more power. But all I have is either what comes from the USB port on the computer or the 1A max from my phone's charger.
Added later...
I have actually discovered that the Y cable works as a normal (not power supplemented) OTG cable for thumb drives, etc. But adding supplemental power to the thing makes everything stop working. The thumb drive which was working prior to adding the power cable stops working. With my Seagate drive (which requires additional power) plugging the Y cable into my phone makes the drive shut down after a few seconds.

Help making OTG cable with power (solved)

Hi
Iv'e tried a lot of the guides on how to make the OTG cable with power but I can't get it to work.
What I tried:
The OTG cable I have from before, but I need it to deliver power.
Every thing works with no power connected, but as soon as i apply power it wont work.
I've been trying to cut the cable in the middle only the red and the black wire, and than ad power to those cables from an usb adapter but as soon as I add power the OTG stops working, and my nexus is not charging.
Iv'e tried adding double the power, cut the black and red wire in the OTG cable, than add 2 USB adapters one sending power to the female USB and one sending power to the micro USB for the Nexus, still nothing.
Tried adding power to black going to both devices and red only to nexus, still nothing.
What am I doing wrong?

Are you using a kernel that supports USB OTG charging? To get mine to charge I have to plug the power into the OTG cable and then plug it into my device.

Hi
Im using timurs kernel seence im going to install it in my car

isn't there a sequence to how you connect it, even with timurs?
like otg first then plugging in the charging USB.

dilldoe said:
isn't there a sequence to how you connect it, even with timurs?
like otg first then plugging in the charging USB.
Click to expand...
Click to collapse
I think i tried them all.
Bit also when its mounted inn The car i cant do an sequence every time i start The car

I found the problem.
The people making the OTG cable have had some fun and used white cable for power and red for data, no wounder I couldn't get it to work

[Q] Query: Note 2 adapter from micro USB to 2+ USB and 1 micro USB for phone charging

Hey all!
I have had a note 2 since a year, and watch a great deal of movies from Hard disks/pen drives via an OTG cable on it. However, I face a problem when the battery goes low and I cannot charge my phone as well as continue watching via OTG.
Hence my query- Is there any hub/adapter which can expand my Note 2 micro USB into a couple of USB ports (1 USB will also suffice, but I'm being a little greedy here ) as well as a micro USB so that I can connect my phone charger and charge the phone as I watch movies.
Any help is appreciated,
Thanks

I think you're looking for something like this...
http://www.amazon.com/gp/aw/d/B00FGKXY9S/ref=pd_aw_sims_1?pi=SS115&simLd=1
But the listing says the cable will not charge the phone. It will only power the accessory attached.

@GarfieldDC- Yes, I want something like this, which can charge my phone as well plz...

is not possible because the connector otg is different from the connector for recharging

You may need this. You can connect even a hub into female usb while other male cable plugged into the charger. I use this cable for many device which does not provide power on otg. And it do charge the phone also
http://m.ebay.com/itm/290460343618?nav=SEARCH

well what u ask is not possible because of fundamantel of the usb

Power from TV usb port 1 amp

Hello,
Is it OK to power the Rpi 2 with the usb port from a TV? I have a Samsung smart tv and it has a 5v, 1 amp usb port.
Is this enough for the Rpi if I use a quality usb cable?
Does the TV wait till the Rpi shuts down properly before closing the usb power? Or does it cut power completely before Rpi does the shutdown procedure? The latter would be bad I reckon and would make everything corrupt.